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R. Gr. VASSAR.

l ALARM Lock.

NQ. 293,690. Y. Patented Feb'. 19,188.4.

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' N. PETERS. wwwmhvmpher. wmngmn. o4 cA AV.`[h\i1TED STATES'V PATENT OFFICE.

ROBERT e. vAssAR, OE NEW YORK, n. Y., AssrGnoR- on Two-'ramos To eARnErr s. Mormon PHILADELRHIM rn., AND JAMES e. sMrrn, OE nnonnnsnok, n. J.

f 'd ALARM-LOOK.

SPECIFICATION -forming part of Letters Patent No. 293,690, dated February 19, 1884.

` Application filed September 18, 1882. (lldfodel.)

To all whom, it may concern: handle for the latter and the operating knob Beit known that I, ROBERT G. VAssAR, a .or handle for the bolt. Fig. 2 shows in side 5o citizen of the United States, and a resident of elevation the operative portions ofthe device,

New York, in the county of New Yorkand the casing being in section. Fig. 3 is a ver- 5' State of New York, have invented a certain tical section on the irregular line xx of Fig. 2. new and useful Alarm-l3olt, of which the fol- Fig. iris avertical section ou the straight line lowing is a specilication. y g/ of Fig. 2. Fig. 5 shows in detailthe parts 55 The object of my invention is to so combine of the guard-plate applied to the stop for the a bolt with an alarmmechanism that the latdetent-arm ofthe alarm mechanism.

IO ter will -be caused togive a signal upon the A indicates the containing casing, and C attempt of an intruder to open the door to the bolt, which slides on the face of a vertical whichthe bolt is applied, or upon an attempt guide-plate, V, secured'to the interior of the 6o to manipulate or gain 'access tothe bolt by any casing, being held against said plate by a v unauthorized means. v spring, l?, affixed to a stud, Z, which latter My invention consists in so arranging the serves to limit the lateral movement of the bolt and alarm that the alarm mechanism will free end of the bolt when it is forced to one be released upon either a longitudinal moveside either by a tool or an attempt to enter ment of the bolt' from the outside of the door, the door when bolted. The end of the bolt C. or a lateral movement ofthe same due to the projects through the edge of the casing, the

2O pressure upon it of a tool, or to an attempt to opening being sufficiently large'to allow the open the door before the bolt is thrown back. opposite end of the bolt tomove laterally or My invention also consists in so combining longitudinally while supported at the edges 7Ov the parts that the operation of the bolt from of the opening, as upon a fulcrum. Aspring, the inside of the door by the key or knob pro- Q, serves to normally hold the free end of the 2 5vided for the purpose will carry the releasing vbolt down, except when it is raised by the 'portion of the bolt out of range of the detent operation of a key or knob, to be presently by which the alarm is released,`so that the described, while a coiled spring, WV, tends to longitudinal movement of the bolt will not in normally hold the bolt back. A pin, Y, holds this case cause the alarm to sound. the bolt shot;7 but when the free end of the 3o My invention consists, further, in a certain. bolt is raised, so as to disengage `it from the novel construction 'and arrangement of the pin, the spring W throws the bolt back. operating-knob, whereby it is normally held K indicates a detent-arm secured to the ar- 8O out of connection with the bolt in such a'way bor of the mainspring J for the alarm mechthat the bolt cannot be readily operated by a anism,'and adapted to engage with a stop 35 tool inserted into the bolt-casing. formed by a shoulder or step upon the edge of My invention further consists in the coma horizontal plate, L, supported by the plate bination, with the catch or stop for a detent- Y, or in any other suitable manner. When so 8 5 arm, applied to the mainspring-shaft of the engaged the alarm mechanism is prevented alarm mechanis1n,of a novel guard-plate,which from acting. The end of thedetent-arm pro- .'lo allows said shaft to make its full number of jects upward above the lower edge of the bolt, revolutions in running down or in winding and also into the path of a shoulder or projecup without interference fromV the stop.' tion, N, upon the side of the bolt, so that, as 9o My invention also consists in certain novel will be readily seen', the detent will be sprung e combinations of devices that will be specified out of engagement with the stop if the bolt is .45 in the claims. .n forced against it laterally either by a tool or In the accompanying drawings, Figure l is by the swinging of the bolt upon its fulcrum aside view ofthe Acontainingcase for the bolt when an attempt is made to open the door A vand alarm mechanism, showing the settingwithout throwing the bolt back, or, if the bolt Abe moved back longitudinally in the event of pin Y being broken off or removed, so as to cause the beveled or rounded shoulder N to come into engagement with it.

The alarm mechanism is of any desired kind, that here shown consisting ofthetoothed wheel D, secured to the mainspring-arbor, the spring J fastened at one end to a fixed post and at the other end to the arbor, pinion I, gearing with wheel I), escapement-wheel F, vibrating escapement H, bell-hammer G, connected thereto, and bell B.

E is a plate secured vupon studs projecting from the side plate of the casing, in which plate kone end of the spindles of the alarm mechanism are supported, while the other ends are supported in the side plate of the casing A or in any other suitable manner.l

Tis a handle ixed to the mainspring-arbor, by means of which the alarm mechanism is wound up and the detent K set in engagement with its stop. The words up77 and down upon the casing indicate the condition of the alarm mechanism-th at is,wh ether it is Wound up or run down.

In order to allow the armv K to pass the stop or shoulder on the stop-plate L in the act of running down or winding up, I have devised what I term a guard-plate,77 (shown in detail in Fig. 5,) and consisting of a plate, M, having an elongated opening or slot,O,through which passes a pin secured to plate L. A spring applied to the guard-plate tends to hold it out, and in the position shown in Fig. 5, so that its edge projects beyond the upper edge of the shoulder upon the stop-plate, and in the act of winding up the arm K will come into engagement with the guard-plate, but Will force the same over to one side until it snaps by it. Vhen, however, the arm is disengaged from the step or shoulder on the plate L, so as to release the alarm mechanism, said arm moving in the reverse direction will ride upon the curved edge of the guard-plate, and will thereby be kept from engaging with the step. The mechanism is thus allowed to run completely down. To set the device, the mechanism is Wound up and the arm 'K turned until it comes against the square edge of the plate M, at which point it is stopped and allowed to engage with the shoulder on the plate L.

S is the knob or handle by means of which the bolt is operated from the inside of the door, so that it can spring back without affecting the alarm. The handleS is fixed permanently or otherwise, as desired, to the operating arm or key It, which plays between two stops, X X, and is mounted upon a spindle carrying a coiled spring, as shown, which latter serves tohold the arm out of line with the bolt until said arm is forced back against the tension of the same into position, where its web may, by turning the handle,A be caused to lift the bolt away from the stop-pin Y. As the arm R is turned, it lifts the free end of the bolt, which then rides on the pin Y, so that the shoulder N passes above the detent K and avoids it when the bolt is forced back. By this means the alarm mechanism is prevented from acting. By areverse movement of the arm the bolt is thrown back to lock the door, the spring Q at the same time acting. to force its free end down, so as to cause it to engage with the pin Y.

I do not limit myself to any particular construction of the alarm mechanism, as it is obvious that many other forms may be used in its place. It is also obvious that other dctent devices might be used in place of 'the spring-arm K, if properly arrangedto be operated and released by the sidewise movement of the free end ofthe bolt, or by the shoulder N, or equivalent device, upon a longitudinal movement without lifting.

Vhat I claim as my invention is- '1. The combination, substantially as described, of an alarm mechanism and detent with a laterally and vertically movable sliding bolt having its fulcrnm in the edge of the casing, and provided with a releasing shoulder or projection for releasing the alarm mechanism upon a longitudinal movement of said bolt in a straight line.

2. The combination, with a laterally and vertically movable bolt, of an alarm mechanism whose detent is arranged in the path of the bolt when moved laterally by any unauthorized means, a. releasing projection or shoulder upon the side of' the bolt for releasing the alarm mechanism upon a longitudinal roo backward movement in a straight line, andan i i i operating key or knob for throwing back the bolt, constructed in the manner described, to lift the end of the bolt carrying the releasingprojection, so that the latter will avoid the detent of the alarm mechanism.

3. The combination, with the alarm-detent mounted on mainspring-arbor of an alarm mechanism, of the bolt C, having operatingshoulder N, and the lateral and vertical pressure-springs l? Q, as and for the purpose described.

4. The combination, with the alarm-detent, of the bolt C, projecting through an opening in the casing, and adapted to have a vertical and lateral movement upon the edges of said opening as a fulcrum, and alarm-detent arranged in the path of the releasing-projection N upon the bolt, and an operating knob or handle, S, provided with means for lifting the free end of the bolt, so that when the bolt is thrown back the alarm will not be sounded.

5. The combination, with an alarm mechanism, ofthe bolt C, confined at one end within an opening in the easing and free to move vertically and horizontally at its other, the spring W, the catch Y, and the operating knob or handle for lifting the free end of the bolt.

6. rlhe combination, with the bolt C, arranged in the manner described, to move vertically and horizontally at its inner end, of

the alarm-detent arrangedin the path of the operating-projection N, the springs P Q W, applied as shown, stop Z, plate V, and catch Y.

7. The combination of a spring detent-arm mounted on mainspring arbor of an al'arm mechanism, means for holding said detent, and

' a laterally-movableibolt, as and for the purlshoulder in either direction.

9. The combination, with the plate L, having a stop or shoulder, and the detent secured tothe mainspring-shaft, of the yielding guardplate M, rounded upon one side, so as to allow lthe detent to pass the shoulder in vrunning down.

Signed at New York, in the county of New York and State of New York, this 16th day of 

